Automobile lifting-jack.



A. PETELER.

AUTOMOBILE LIFTING JACK.

APPLICATION FILED MAR. 8, 1916. 1,214,710. Patented Feb. 6,1917.

4 SHEETS-SHEET l.

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A. PETELER.

AUTOMOBILE LIFTING JACK.

APPLICATION FILED MAR. B 1916.

l ,2 1 4,71 0. Patented Feb. 6, 1917.

4 SHEETS-SHEET 2.

A. PETELER.

AUTOMOBILE LIFTiNG JACK.

APPLICATION FILED MAR.8.1916.

1,214,710. Patented Feb. 6,1917.

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AUTOMOBILE LIFTING JACK.

APPLICATION FILED MAR` 8. 1916` Lmew. Peeemaed Feb. 6,191?.

4 SHEETSSHEET 4.

- pawl and detent.

ADOLPH PETELER, OF NW YORK, N. Y.

AUTOMOBILE murine-JACK.

Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed March 8, 1916. Serial No. 82,796.

To @ZZ whom it may concern:

Bc it known that I, ADoLri-r PETELER, a citizen of the United States, of 249 Centre street, N ew York, county of New York and State oi' New York, have invented certain new and useful improvements in Automobile Lifting-Jacks, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to an improved construction of lifting jack possessing novel mechanism for the control of the lifting pawl and the supporting detent during the operations of raising and lowering the litter-bai: by the. liand-lever, or raising or lowering the lifter-bar diiectly by hand to adjust it quickly into any desired position.

A. round lifter-bar may be used in tlie present construction with circular rackteetli i'oi'med thereon, or a square lifter-bar may be used with rack-teeth upon one edge only; but in either construction the pawi and detent are provided each with a pin projected from one side of the casing through a plate upon the casing, upon which plate cams are movable to -operate upon the pins and control the movements of the pawl and detent as desired.

The cams are formed upon cam-bodies which are movable upon the outer surface of the plate, and the cam-bodies are. pressed by springs to press the cams upon the pins, and means is provided to retract the cambodiesdn opposition to the pressure oi such springs, and hold the cams in an inoperative position.

The casing of the jack is formed with a box through which the lifter-bar is extended. guides for the bar being Jformed in the casing` at the. upper and lower edges ot the box. The box is preferably open at one side to insert the detent and the hand-lever socket, cach ot which has its inner end jouinaled in the rear side oi' the box, and its outer end jouinaled in a journal-plate which is applied to cover the open side of the box.

The cams and all their attachments are mounted upon the outer side oiy the joui'- nal-'olate and can thus be secured thereto ai'idladjusted in their operative position, so that the mere attachment of the journalp'late to theY casing brings such parts into their operatii'fe relation to the pins of the cover is provided to inclose all the pai-ts attached to the journalplate.

The invention includes various details of construction which will be understood by reference to the annexed drawing, in which- Figure 1 is a 'side elevation oi the jack with the cover removed to expose the journal-plate and its attachments; Fig. 2 is a side elevation of the head of the jack with both the cover and the journal-plate removed; Fig. 3 is a plan in section on line 3-3 in Fig. 1; Fig. d is a side elevation of the detent; Fig. 5 is a side view of the pawl; and Fig. 6 is a. side view of thelitei'-'toot and its carrier, the carrier being broken for want of room upon the drawing. Fig. 47 is a plan in section 'on line 77 in Fig. l. Figs. 8, 9 and 10 are diagrams showing vai-ious arrangements of the cam during different operations of the jack, Fig. 8 showing the deteiit-cain operating to hold the detent from the teeth of the lifter-bar; l Fig. 9 showing the' pawl-cam operating to hold the pawl from the teeth oi the lifter-bar; and Fig. 10, showing both cams held in an inoperative position, so that the pawl when operated by the hand-lever may be free to raise the lifter-bar in the usual manner. Fig. 11 is a side view, and Fig. 12 an edge view of the pawl-cam and the body, shown in Fig. 1. Fig. 13 is an edge view of the jack; Fig. 14 an outer View of the cover N for the journal-plate E, and Fig. 15 is an elevation oi the cani' fixtures applied to a aawl and detent at the same side of arackin Fig, l, the casing of the jack is shown with a. box B adjacent to the top and having a column A. extended below the box and provided with a base B', and the column extended at A above the box to form a guide for the lifter-bar C. Cylindrical guides C are shown in the column above and below the box. and the lifter-bar is made round and provided with annular sloping teeth C2 and with a lifting-head C3. A hand-lever socket i D is furnished with journals at opposite sides fitted respectively to a 'bearing D in the rear side of the box B and to a bearing D2 in the journal-plate E secured upon the ii'ont of the box, bei-ng thus hinged upon the casing, of which the plate. E forms a part.

l The plate is secured by screws E to lugs E2 which are projected inward from the walls of the box, and the plate is formed with rounded ears which are fitted to milled seats E3 projecting from the lugs, so that the plate is firmly supported to sustain the load imposed upon it by the journals of the detentJ and hand-lever socket, and the screws are relieved entirely of the load by the contact of the ears with the milled seats.

A pawl F is journaled upon the inn'er end of the hand-lever socket by a pivot ci so that the oscillation of the socket by a suitable handle D (secured therein by a bayonet-lock cl3, see Fig. 3) raises and lowers the pawl to lift the lifter-bar- A detent G, for supporting the bar when li l'ted, is provided with journals at the opposite sides of its lower end, one of which is fitted to a bearing Gr in the rear side of the box and the other to a bearing C2 '.n the journal-plate Fi. Pins a, and (1, are projected from the outer edges respectively of the pawl and detent and extended through the journal-plate, far enough to engage the sloping surfaces of the cams o and c.

The two cams are formed respectively at the upper ends of two parallel bodies Z and cl, which are held movably upon the outer side of the journal-plate by screws or rivets e inserted through slots e in the cam-bodies, so as to be movable vertically.

The cam-surfaces are sloped outwardly from their upper ends, and the pins a and a touch the upper ends of these cam-surfaces, when the head of the pawl is raised by the hand-lever socket D to a level with the head of the detent, as shown in Figs. l and 2. The pawl and detent are pressed normally toward the lifter-bar by a spring attached at opposite ends to the pins a and a', which spring is shown in Figs. 2 and 3 only, as its presence would confuse the other figures.

A. recess H extends downward from the box upon the open side of the same, and the cam-bodies have shanks Z2 projected downwardly though a foot-plate f which is fitted to the recess H to support springs g, g fitted each between the foot-plate and one of the cam-bodies. These springs press the cambodies normally upward, and such upward movement operates to press the upper corner of the cam c against the pin a, exerting a spring tendency to retract the detent from the teeth of the lifter-bar. Such tendency produces no effect so long as the load upon the lifter-bar rests upon the detent, as is represented in Fig. l, but the moment thatthe load is lifted by the pawl the cam rises and pushes the detent outward as shown in Fig. S. The spring under the cam-body CZ is shown compressed in Fig. l, as when the cam is held from movement by the load upon the detent.

The cam c is shown in Fig. l raised to its full height by the spring upon its shank, in

which position the pawl, if carrying the load, forces the cam downward as the pawl descends, when moved downwardly by the hand-lever socket.

The two cam-bodies are provided with opposed snoulders o, and the Cain-body Z is provided with a cross-piece upon which a manually operated cam z' is arranged to bear. This manual cam is pivoted upon the journal-plate E by a screw f', and has a handle by which it may be turned into itsidle po sition shown in l, or into its effective position shown in Fig. l0. ln Fig. l, the position of this manual cani permits the cam-body al' to rise freely under the influence of the spring g, but the turning of vthe cani it its effective position, as shown in Fig.

lo, pushes the cam-body d downward, and

by the engagement of the shoulders o, as shown 1n Fig, l0, also holds the cam-body (t fronivrising. Both cams are thus hold inv an inoperative position; which leaves the Jawl and detent free as shown in FiO'. 10` 7 C 7 for the operator to raise the lifter-bar in the normal manner, by a mere oscillation of the hand-lever.

The springs g and g are made of such strength that they are able to raise their respective cam-bodies and push the pawl orV detent outwardly, in opposition to the spring when no load rests upon the pawl or detent.

In lowering the lifter-bar with a load, the pawl F is lowered, which has the eect of pushing the cam c downward until the load is caught by the detent. l/Vhen the load wholly rests upon the detent, the pawl is free and the upward pressure of the cam o moves the pawl outward, thus disengaging it from the tooth last lowered and permitting it to be raised to engage the tooth above. In such upward movement of the pawl, the cam c remains stationary, as its sloping surface permits the pin e to move inward as the pawl enters the space above the tooth last engaged. When the pawl engages the'succeeding tooth, the operator lifts the l oad slightly by such pawl to disengage the detent, and the detent is then immediately pushed outward by the automatic lifting of its cam c. Such action of the cam e is shown in Fig. 8, the rising of the cam-body fl bringing the shoulders 0 in contact with one another as shown in that ligure. rl`he detent being clear from the teeth, the pawl is then lowered with the load and pushes the cam o downwardly also carrying down with it the cam c. as shown in Fig. l0, thus permitting the detent to engage a subsequent tooth. lit/hen the load again rests upon the detent the pawl is relieved of its load and is cleared from the teeth by the automatic rising of its cam c. rllhis permits the pawl to be lifted again to engage and lower another tooth, as already described. To raise and loweil the litter-bar freely by hand, the haiid-lever is depressed, thus lifting the pawl sul'liciently to release the detent from its load. VWhen this is done the cam c automatically rises and draws the detent out from the .lifter-bai', as shown iii Fig. 8. The weight oi the lifter-bar is insufficient to oppose the action of the spring g upon the cam c, and when the pawl is then lowered the cam c remains in its elevated position and operates to retract it from the lifter-bar, which permits the lifter-bar to drop automatically and leaves the bar entirely free to be raised and lowered by hand. A hanging-bar l is attached to the lifting-head C3 to cai-ry a lifter-foot. This hanging-bar eX- teiids downward by the side of the box B, upon which it is guided by lugs J. i-i foot li is provided with a :tlaiige l having studs l.' attached thereto to engage slots lill iii the tace ot the hanging-bai'. This construction permits the toot to be engaged with the hanging-bai' at various distances 'from the hitting-head. C to lit beneath any object which it desired to raise. Substantially the saine cani mechanism is applicable to a litter-bar toothed upon one side only, so that the pawl and detent are both applied to one side. Such a construction is shown in Fig. l5, w ere the lifter-bar C4 is provided with teeth c2 upon one side only, and the pawl F and detent Gf3 are fitted to the teeth upon the bar one above the other. rlhe bar is covered by a plate C5 which would serve as a journal-plate it extended over the pivot d6 of the hand-lever socket and the pivot g3 of the detent. The cam-bodies Z4 and Z5 are mounted parallel with one another upon the plate C5 and movable vertically and provided with springs g4 and g5 resting upon a foot-plate f. The relation of these parts will be understood from the description of the previous figures.

The pawl F has a pin a2 projected from it to engage a cam e2 carried by the cambody (Z4, and the detent G3 has a pin a3 projected from it to engage the cam e3 upon the cam-body d5. The cain-body Z4 is provided with seat or cross-piece z/ and a manually operated cam Z operates to depress the same when the handle 7o is raised. All these parts operate precisely the same as in the construction of Fig. l, so that the language of claim 1 describes the two constructions equally.

The construction of the jack is very advantageous, as it locates upon the outer side ot the casing all the cam mechanism which operates upon the pawl and detent, while such mechanism is entirely protected from injury by the cover N. Such location i'or the cani mechanism is attained by the use of the journal-plate E to form the outer side of the box B, and the projection of the pins o and a through, and from the outer side of,vsuch plate to be engaged by the cams c and c. This disposition of the cams yupon the outer side of the journal-plate renders the mechanism within the boX more compact and the box itself relativelv small in comparison with the body or column of the jack, and permits examination and repairs of the cam mechanism with the utinost facility. rl`he j ournal-plate also serves as a foundation upon which all the cam mechanism is assembled and adjusted before the plate is applied to the body of the jack. This compactness is also promoted by locating the spring o inside -oi the journal-plate, where it does not occupy any useful space.

Having thus set forth the nature of the invention what is claimed herein is:

l. ln a lifting jack, the combination, w'tli a casing and a toothed litter-bar, of a deteiit hiiioed upoii the casing to engage the teeth oi the bai', and a hand-lever socket hinged upon the casing with a pawl pivoted thereon to engage the teeth of the bai', means to press the detent and the pawl normally into the said teeth, pins projected respecti rely from the detent and the pawl at one side of the casing, and cams movable contiguous to the pins and having springs operating normally to press the cams upon the pins to retract the pawl and detent from the teeth.

2. In a lifting jack, the combination, with a casing and a toothed lifter-bar, of a detent hinged upon the casing` to engage the teeth of the bar, and a hand-lever socket hinged upon the easing with a pawl pivoted thereon to engage the teeth of the bar, means to press the detent and the pawl normally into the said teeth, pins projected respectively from the detent and the pawl at one side of the casing, cams movable contiguous to the pins, springs pressing' the cams normally against the pins, and means for moving the cams to an inoperative position. for the pui'- pose set forth.

3. In a lifting jack, the combination, with a casing and a toothed lifter-bai', of a. detent hinged upon the casing to engage the teeth of the bar, and a hand-lever socket hinged upon the casing with a pawl pivoted thereon to engage the teeth of the bar, means to press the detent and the pawl normally into the said teeth, pins projected respectively from the detent and the pawl at one side ot the casing, cam-bodies movable parallel with one another between the said pins and having outwardly sloped cam-faces to press the pins apart, and springs .operating upon the cam-bodies to press the cam-faces normally against the said pins.

t. ln a lifting ack, the combination, with a casing having a box open upon one side and a lifter-bar movable vertically through the boX, of a journal-plate secured on the box, a hand-lever socket and a detent having journals at their opposite sides fitted respectively to the rear side of the box and the journal-plate, a paivl pivoted upon the y hand-lever socket to engage the teeth or" the lifter-bar, pins projected respectively from the detent and the paivl through the said journal-plate, cams mounted to move upon the journal-plate in contact With the pins, and means Jfor pressing the cams normally toward the pins. Y

1n a lifting jack, the combination, with a casing having' a box open upon one side and a lifter-bar movable vertically through the box, of a hand-lever socket pivoted on the casing', a paivl pivoted upon the handlever socket to engage the teeth of the bar, a journal-plate secured upon the open. side of the box, a detent hinged upon the ezlsing to engage the teethv of the bar, means to press the detent and pawl normally into the said teeth, pins jn'ojected respectively -from the detent and the paivl through the said jrnlrnal-plate, cams mounted to move upon the journal-plate in contact with the pins, and sjiu'ings tor pressing the cams normally toward the said pins.

6. in a lifting jack, the combination, with a casing having a box open upon one side and a lifter-bar movable vertically through the box, of a hand-lever socket pivoted on the casing, a pavvl pivoted upon the hand-lever socket to engage the teeth of the bar, a journal-plate secured upon the open side of the box, a detent hinged upon the casing to engage the teeth of the bar, .means to press the detent and pavvl normally into the said teeth, pins projected respectively from the detent and the paivl through the said jonrnal-plate, cams mounted to move upon the journal-plate in contact With the pins, springs for pressing the cams normally toward the said pins, and a manually operated cam movable on the journal-plate to move the cam-bodies to an inoperative position.

7. In a lifting jack, the combination,ivith a casing having' a box open upon one side and a lifter-bar movable vertically through the box, of a hand-lever socket journaled in one edge of the box with a paivl pivoted thereon, a journal-plate secured upon the open side of the box, a detent hinged upon the casing to engage the teeth of the bar, means to press the detent and paWl normally into the said teeth, pins projected respectively from the detent and the paivl through the said journal-plate, cam-bodies movable upon the j ourn al-plate parallel With one another and having outwardly sloping camfaces to press the pins apart, springs pressingthe cam-bodies longitudinally to press the cam-faces normally against the said pins, and means for retracting the cambodies in opposition to the said springs.

S. 1n a lifting jack, the combination, With a casing having a box open upon one side, of cylindrical guides in the casing at the top and bottom of the box, a cylindrical toothed lifter-bar fitted to such guides, a journal-plate secured upon the open side of the box, a detent journaled upon the box and journal-plate, a hand-lever socket j ournaled upon the box and journal-plate, a paWl pivoted upon the hand-lever socket to engage the teeth ot' the bar, pins projected respectively from the detent and paWl through the said journal-plate, cam-bodies movable upon the journal-plate, and cams carried by such bodies, with springs to move the cams automatically toward the pins, and operating to retract the paivl or the detent When the saine is free from load.

i). Vin a lifting ack, the combination, with a casing having a `box open upon one side with guides in the casing above and below the box and a toothed litter-bar fitted. to such guides, oil a lifter-bar movable verticallyr through the guides, lugs projected inwardly from the edges or" the box adjacent to the open side with circular seats upon such lugs next the wall of the box a journal-plate fitted to the lugs and having rounded ears litted to the seats, a detent pivoted upon the rear side of the box and the journal-plate, and av hand-lever socket pivoted upon the rear side ol the box and the journal plate, With a pavvl carried by the hand-lever socket `for raising and lowering the lifter-bar. l

10. in a lifting jack, the combination, with a casing having a box open upon one side, and a lifter-bar movable vertically through the box, of a journal-plate secured upon the open side of the box, a hand-lever socket and a detent having journals at their opposite sides itted respectively to the rear side of the box and the journal-plate, a paivl pivoted upon the hand-lever socket to engage the teeth of the lifter-bar, means to press the detent and paWl normally into the said teeth, pins projected from the detent and paivl through the said journal-plate, cam-bodies fitted movably upon the journalplate and having respectively cams to operate upon the pins of the detent and paWl, the cam-bodies being parallel with one another and slotted longitudinally and secured upon the journal-plate by rivets inserted through the slots, and a foot-plate With springs inserted between. the foot-plate and the cam-bodies, pressing the cams normally toward the said pins.

l1. 1n a lifting jack, the combination, with a casing having a box open upon one side, a-toothed lifter-bar movable through the box, of a j ournal-plate secured upon the open side of the box, a detent and a handlever socket j ournaled upon the rear side of the box and upon the journal-plate, With a pawl pivoted upon the hand-lever socket,

- recess extended downward trom the box to receive the said shanks and springs, and the recess having lQ .,oot-plate therein to sustain the springs.

12. In a lifting jack, the combination, with a casing having a box open at one side with guides in the casing above and below the box and a toothed lifter-bar fitted to such guides, of a lifter-bar movable vertically through the guides7 lugs projected 1n- Copies of this patent may be obtained for wardly from the edges of the box adjacent to the open side with seats upon such lugs to engage the journal-plate, a journal-plate fitted to the lugs and having' ears itted to the said seats, means for fastening the ears to the lugs, a detent pivoted upon the rear I side of the box and journal-plate, a handlever socket pivoted upon the rear side of the box and the journal-plate, with a pawl carried by the hand-lever socket, the astenings of the journal-plate being wholly relieved from the strain of the detent and .I hand-lever socket by the engagement ot' the journal-plate with the seats upon the lugs.

ln testimony whereof I have hereunto set my hand.

ADOLPH PETELER.

five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

